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math,algebra

posted by on .

How do you solve these types of math problems.

Directions: Solve each literal equation for the indicated variable.

A=1/2h(B+b) (For b) Area of a trapezoid

It is just a matter of algebraic manipulation.

A=(1/2)h(B+b)
Multiply both sides of the equation by 2/h.
B+b = 2A/h
b = (2A/h) - B

  • math,algebra - ,

    The formula
    A
    =
    1
    2
    h
    (
    b
    1
    +
    b
    2
    )
    A=12h(b1+b2) gives the area,
    A
    A, of a trapezoid with parallel sides of length
    b
    1
    b1 and
    b
    2
    b2 and perpendicular height,
    h
    h .

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